JPH076302B2 - Self-supporting utility pole and its construction method - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a self-supporting utility pole in which a utility pole is self-supporting without depending on a branch line or a support pole, and a method for constructing a building pole therefor.

[Conventional technology]

In recent years, in order to beautify the environment or eliminate obstacles to traffic in urban areas, or to eliminate the obstacles on agricultural land due to effective use of land and mechanization, even on agricultural land, the utility pole itself must be removed to eliminate the utility pole branch line or support pole. The construction method of self-standing and building columns is adopted.

Therefore, FIG. 5 shows a conventional self-supporting power pole. This self-supporting power pole is obtained by inserting a power pole 51 formed of a concrete pole or a steel pipe pole into the inner cavity of a foundation pipe 52 buried in soil 54, and near the surface of the earth. A wide hole 53 exposing the upper end of the foundation pipe 52 is filled with rapid-hardening cement 56, and the utility pole 51 and the foundation pipe 52 are
The utility pole 51 is self-supporting by being coupled with.

[Problems to be Solved by the Invention]

By the way, since the above-mentioned self-supporting utility pole 51 is formed by a single pole that is 14 meters in length, it requires a special vehicle for transportation, especially in urban areas, and is also suitable for building pillar construction in narrow urban areas. Was causing inconvenience.

Above all, the utility pole formed by the concrete pole is heavy and requires a great deal of labor for the building pole, and is very dangerous in transportation and construction.

In addition, the electric pole formed by the steel pipe pole has a problem in that it has a problem in electrical insulation, is liable to bend due to its structure, and is expensive.

Furthermore, regardless of whether the utility pole is formed by a concrete pole or a steel pipe pole, special cement is required to connect with the foundation pipe 52, and the excavated soil of the vertical hole excavated when the foundation pipe 52 is buried. Disposing of the remaining soil was also laborious.

Also, since no branch lines or columns are needed, the load applied to the entire utility pole 51 is concentrated at the boundary of the ground surface. Therefore, in terms of strength, the utility pole should have a large diameter, but on the other hand for environmental beautification. There is also a request for a smaller diameter.

[Means for Solving the Problems]

The present invention has been made in view of the above circumstances,
A means for solving the problems of the present invention will be described with reference to FIGS. 1 to 4 corresponding to an embodiment. A base pipe (1) having a flange (4) fixedly provided on an upper end thereof and the above-mentioned base pipe at a lower end thereof. A steel pipe pole (2) having a flange (5) fixed to the flange (4) of the base pipe (1) by bolts and a vertical reinforcing plate (2a) fixed to the inner cavity, and the steel pipe at the lower end. A self-supporting utility pole comprising a combination of a vertical steel pipe (6) fitted to an upper end portion of a pole (2) and a concrete pole (3) integrally coupled to the pole (2). The foundation pipe (1) was embedded in the vertical hole (12) excavated in 10), and the flange (4) provided at the upper end of the foundation pipe (1) and the lower end of the steel pipe pole (2) were fixed. By connecting the flange (5) and the flange (5) to each other by the bolt (8), the steel pipe pole (2 On the foundation pipe (1), and a vertical steel pipe (6) integrally connected to the lower end of the concrete pole (3) is fitted to the upper end of the steel pipe pole (2) to make the concrete pole (3). ) Is connected on the steel pipe pole (2).

Further, the foundation pipe (1) has a diameter slightly larger than that of the vertical hole (12) excavated in the soil (10), the cutting edge (7) is fixed to the lower end edge of the foundation pipe (1), and the screw auger is provided in the middle of the bore. If a stopper (17) that locks with the tip harpoon (16) of the screw auger is fixed, the tip harpoon (16) of the screw auger is engaged with the stopper (17) and pushed down to move the base pipe (1). It can be embedded in the vertical hole (12).

[Action]

In the present invention, a utility pole that is conventionally formed by partially burying it in the ground with a single pole makes it possible to separate the subsurface foundation pipe (1) from the utility pole section on the surface of the earth, and Since the utility pole part is also the connection structure of the steel pipe pole (2) and the concrete pole (3), each component on the ground surface can be generally divided into less than half the length of conventional utility poles, and it can be used for transportation and construction pole construction. It will be convenient. However, the lengths of the steel pipe pole (2) and the concrete pole (3) are not limited to half-division, and can be determined from the relationship of strength and the like.

Moreover, since the upper side of the electric pole is constituted by the concrete pole (3), the arm for tensioning the electric wire is provided on the concrete pole (3) side, and the electrical insulation can be secured safely.

Further, since the steel pipe pole (2) is connected to the upper end of the foundation pipe (1) buried in the soil (10) with the bolts (6) via the flanges (4, 5) of each other, as in the conventional case. There is no need for treatment with rapid-hardening cement to connect with the foundation structure, and replacement work of the utility pole on the surface can be performed with the foundation pipe (1) buried in the soil.

Further, since the steel pipe pole (2) has a structure in which a vertical reinforcing plate (2a) is fixedly installed in its inner cavity, the strength of the steel pipe pole (2) on which the load of the entire electric pole is concentrated is increased, and the reinforcing plate (2 2a) is attached to the entire electric pole, whereas in the present invention, it is sufficient to attach it to the steel pipe pole (2) having a divided length, which reduces the manufacturing labor.

〔Example〕

 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is an elevation view of a self-supporting utility pole according to the present invention, and FIG. 2 (a).
1 is a cross sectional view taken along the line AA of FIG. 1, FIG. 2 (b) is a cross sectional view taken along the line BB of FIG. 1, and FIG. 2 (c) is a line CC of FIG. FIG. 2 (d) is a cross-sectional view showing another embodiment of FIG. 2 (c), and FIG. 3 is a partially enlarged side view showing the vicinity of the ground surface of FIG. 4A to 4E are construction process diagrams for constructing the self-supporting utility pole shown in FIG.

In FIG. 1, 1 is a foundation pipe buried in the soil 10, 2 is a steel pipe pole that is connected to the foundation pipe 1 and is independent, and 3 is a concrete pole that is connected to the steel pipe pole 2 and is independent. Is.

The base pipe 1 has a diameter slightly larger than the vertical hole 12 excavated in the soil 10, and a plurality of cutting blades 7, 7 ...
Is fixed, and a stopper 17 (Figs. 4 (a) and (b)) that locks with the tip harpoon 16 of the screw auger is fixed in the middle of the lumen, and the flange 4 is further provided at the upper end. It is fixed.

The steel pipe pole 2 has a lower end fixed with a flange 5 having the same diameter as the flange 4 of the foundation pipe 1, and the foundation pipe 1 and the steel pipe pole 2 are connected to each other by bolts 8 as shown in FIG.

Below the surface of the vertical hole 12, a wide hole 13 having a diameter slightly larger than the outer diameter of the flange 4 of the foundation pipe 1 is bored.
And the connection structure of the flanges 4 and 5 of the steel pipe pole 2 in the soil 10
It is housed under the ground.

The inner diameter of the steel pipe pole 2 is shown in FIGS. 2 (c) and (d).
The strength of the steel pipe pole 2 is increased by fixing a reinforcing plate 2a having a cross-sectional shape such as a cross or a Y shape as shown in FIG. It should be noted that the reinforcing plate 2a may have various configurations in consideration of strength and production.

The concrete pole 3 is, as shown in FIG. 2 (a),
A reinforcing steel bar 3a is vertically arranged inside and a vertical steel pipe 6 is integrally connected to the outer periphery of the lower end portion, and the lower end of the vertical steel pipe 6 is projected in a hollow shape, and a steel pipe pole is provided in the hollow portion 6a. The upper ends of the two are fitted and connected.

A method of constructing such a self-supporting utility pole will be described with reference to FIG. 4. First, a vertical hole 12 is excavated from the ground surface with a screw auger 15 at a required position in the soil 10. However, the hole diameter of the vertical hole 12 is formed to be slightly larger than the outer diameter of the base pipe 1 to be inserted.

Next, a wide hole 13 for accommodating the flange 4 of the foundation pipe 1 is bored below the surface of the vertical hole 12, and the tip harpoon 16 of the screw auger 15 is engaged with a stopper 17 in the foundation pipe 1 to move downward. When the screw auger 15 is rotated while applying a load, the foundation pipe 12 is also rotated and the inner wall of the vertical hole 12 is broken down by the cutting blades 7, 7 ... At the lower end edge of the foundation pipe 12 (Fig. 4 (b)). ), The foundation pipe 12 is densely inserted into the inner periphery of the vertical hole 12 (Fig. 4 (c)).

Therefore, the flange 4 provided at the upper end of the base pipe 1 is connected to the flange 5 provided at the lower end of the steel pipe pole 2 by bolts 8 so that the steel pipe pole 2 is self-supporting on the base pipe 1 ( FIG. 4 (d)). After the flange 4 of the base pipe 1 and the flange 5 of the steel pipe pole 2 are connected, sand 11 is filled in the void of the wide hole 13.

Further, by fitting the vertical steel pipe 6 at the lower end of the concrete pole 3 to the upper end portion of the steel pipe pole 2, the concrete pole 3 is connected onto the steel pipe pole 2 (Fig. 4 (e)), and as shown in Fig. 1. Complete a self-supporting utility pole as shown.

〔The invention's effect〕

As described above, the present invention has a structure in which the foundation pipe below the surface of the earth and the electric pole portion on the surface of the earth can be separated, and the electric pole portion on the surface of the earth is also a combined structure of a steel pipe pole and a concrete pole, The length of each member can be made very short compared to a utility pole consisting of one piece, and since these constituent members can be assembled at the construction site, it is extremely easy to handle in production, transportation and construction. Is. In particular, it does not require a special vehicle for construction in urban areas, can be easily transported, and can be handled easily in narrow spaces, thus avoiding danger as much as possible.

In addition, since the arm for stretching the electric wire is provided on the concrete pole that constitutes the upper side of the electric pole, the electrical insulation can be secured safely.

Furthermore, since the steel pipe pole on the surface of the ground and the foundation pipe below the surface of the ground can be firmly connected by bolt connection through the flanges of each other, there is no need for treatment with rapid hardening cement as in the past, and the foundation pipe It will be possible to replace only the utility pole members on the surface of the ground while burying it in the soil.

In addition, the steel pipe pole side where the load of the entire electric pole is concentrated can be made to have high strength by strengthening the reinforcing plate of the inner cavity, so high strength is realized without increasing the outer diameter of the steel pipe pole, Furthermore, it is possible to reduce the diameter, which is beneficial for the preservation of environmental beautification.

[Brief description of drawings]

FIG. 1 is an elevation view of a self-supporting utility pole according to the present invention, and FIG. 2 (a).
1 is a cross sectional view taken along the line AA of FIG. 1, FIG. 2 (b) is a cross sectional view taken along the line BB of FIG. 1, and FIG. 2 (c) is a line CC of FIG. FIG. 2 (d) is a cross-sectional view showing another embodiment of FIG. 2 (c), and FIG. 3 is a partially enlarged side view showing the vicinity of the ground surface of FIG. 4 (a) to (e) are construction process diagrams for constructing the self-supporting utility pole shown in FIG. 1, and FIG. 5 is a side view of a conventional self-supporting utility pole. 1 ... Foundation pipe, 2 ... Steel pipe pole, 2a ... Reinforcing plate,
3 …… Concrete pole, 4 …… Flange on the base pipe side, 5 …… Steel pipe pole flange, 6 …… Vertical steel pipe, 7
…… Cutting blade, 8 …… bolt.

Claims (3)

[Claims] 1. A base pipe (1) having a flange (4) fixed to the upper end, and a flange (5) bolted to the flange (4) of the base pipe (1) at the lower end. Steel pipe pole (2) with a vertical reinforcing plate (2a) fixed in the cavity
And a concrete pole (3) integrally connected to the lower end with a vertical steel pipe (6) fitted to the upper end of the steel pipe pole (2)
A free-standing utility pole that is characterized by being combined with. 2. A foundation pipe (1) is embedded in a vertical hole (12) excavated in the soil (10), and a flange (4) and a steel pipe pole (2) provided at the upper end of the foundation pipe (1). ), The steel pipe pole (2) is made to stand on the foundation pipe (1) by connecting the flange (5) fixed to the bottom end of the concrete pipe (1) to each other with a bolt (8), and the bottom end of the concrete pole (3). A vertical steel pipe (6) integrally connected to the steel pipe pole (2) is fitted to the upper end of the steel pipe pole (2) to connect the concrete pole (3) to the steel pipe pole (2). Construction method of building pole. 3. The foundation pipe (1) has a diameter slightly larger than that of a vertical hole (12) excavated in the soil (10), and a cutting blade (7) is fixed to the lower end edge of the foundation pipe (1) along the inner cavity. A stopper (17) that locks the tip harpoon (16) of the screw auger is fixed to the base pipe (1) by pushing the tip harpoon (16) of the screw auger into the stopper (17) and pushing it down. ) Is buried in the vertical hole (12), the method for constructing a self-supporting utility pole according to claim 2.